commit.c/GPG signature verification: Also look at the first GPG status line

Signed-off-by: Sebastian Götte <jaseg@physik-pool.tu-berlin.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

commit.c

diff --git a/commit.c b/commit.c
index 66a3f4e..94029c9 100644
--- a/commit.c
+++ b/commit.c
@@ -1054,13 +1054,20 @@
 	const char *buf = sigc->gpg_status;
 	int i;
 
+	/* Iterate over all search strings */
 	for (i = 0; i < ARRAY_SIZE(sigcheck_gpg_status); i++) {
-		const char *found = strstr(buf, sigcheck_gpg_status[i].check);
-		const char *next;
-		if (!found)
-			continue;
+		const char *found, *next;
+
+		if (!prefixcmp(buf, sigcheck_gpg_status[i].check + 1)) {
+			/* At the very beginning of the buffer */
+			found = buf + strlen(sigcheck_gpg_status[i].check + 1);
+		} else {
+			found = strstr(buf, sigcheck_gpg_status[i].check);
+			if (!found)
+				continue;
+			found += strlen(sigcheck_gpg_status[i].check);
+		}
 		sigc->result = sigcheck_gpg_status[i].result;
-		found += strlen(sigcheck_gpg_status[i].check);
 		sigc->key = xmemdupz(found, 16);
 		found += 17;
 		next = strchrnul(found, '\n');